tool
Server-mirrored validation
Client-side validation can improve usability, but server-side validation must enforce the actual rule.
正文
Helpful validation feedback can show progress and reduce user confusion, but client-side checks are not a security boundary. Any important rule should be mirrored and enforced on the server.
In AI product workflows, this applies to prompts, idea payloads, account actions, credits, and content submission forms. The interface can guide users, but the backend must protect the contract.
来源引用
U.S. Web Design System Validation Component
Source: U.S. Web Design System Validation Component
USWDS validation guidance frames validation as helpful feedback and notes that client-side validation should be mirrored server-side.
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